Improvement in cultivator-teeth



' UrrEn STATES PATENT OFFICEo JOSEPH STOOKDALE,.OF YPSILAN'II, MICHIGAN.

IMPROVEMENT lN CULTIVATOR-TEETH.

Specification forming part of Letters Patent ANo. 12,332, dated January30,1855.

To all whom it may concern:

Beit known that I, JOSEPH SrooKDALE, of Ypsilanti, in the county ofWashtenaw and State of Michigan, have invented a new and useful Machinefor Fastening, Securing, or Holding Cultivator-Teeth; and Ido herebydeclare that the following is afull, clear, and ex..

act description ofthe construction and opera-v tion of the same,reference being had to the accompanying drawings, making a part of thisspecification, and to the letters of ret'erenee and figures markedthereon, to wit:

Figure l represents the back of a cultiva-tortooth with reversiblecast-iron plate thereon. (MarkedFig.4.) Letter()representsawroughtironbolt tive-eighths of an inch in size, which forms the shank of thetoot-h, and to which the `said tooth is fastened, as represented byletter D, by bolt; and nut or by rivet ruiming -up and passing throughsaid reversible cast-iron plates, as represented by Fig. 3, letter I,and also through the frame ot' the cultivator, and is secured on the topof the frame ot' said cultivator by Washer and nut, (marked A B,) asseen on Fig. 1. The dotted mortise at z' een reversible plate, Fig. l,represents the depth and form which the tooth sets, and is let into theunder side of said reversible plate. (Represented on Fig. 3, letter K.)y

Fig. 2 represents a side view of eultivatortooth with wrought-ironshank-screw, Washer, and nut, as aforesaid, with letter H, a sectionalview and application of reversible cast iron plate. Fig. 3. Theletter Grrepresents a stay-pin cast upon the upper side of said reversible plate,ot' about three-fourths of an inch in length and round, which is to beinserted in the under side of frame of .culti\f'ator, the use of whichis to prevent the plate from turning or moving, and also to strengthenthe resistance or pressure of the tooth or teeth. The dotted line atletter S, Fig, 4, represents the top of the tooth and the form which thetooth is set into the said reversible plate, as represented by thegroove, letters K on Fig. 3, the under side of said plate.

Fig. 3 represents the under side of the reversible cast-iron plate,being made of a greater thickness at one end, as seen in Fig. 4, whichmay be increased or diminished in size land thickness as may berequired. Letter K, as represented in Fig. 3, is the groove into whichthe upper end of said tooth is inserted for the purpose ot' securing apermanent and convenient fastening for the cultivater-tooth. Letter J,as seen in Fig. 3, represents a hole through the end of said plate forthe reception of a bolt, if found necessary to make said plate morepermanent. The said reversible cast-iron plate is designed and made tobe used on either side of the frame of the eultivator, and being placedon a line parallel with the inside of the frame of the cultivator, asseen on two dotted lines, (marked Fig. 5,) places the tooth or teeth inthe exact position to make straight lands or furrows. Further, thereversible plate, being made ot' a greater thickness at one end, setsthe tooth or teeth in the exact position or pitch for practical use.

What I claim as my invention, and desire t0 secure by Letters Patent, is

The reversible cast-iron plate, (marked Fig. 3,) with the groove on theunder side, (marked letterK,)roundcast-iron stay-pin on upperside,(marked letter G, reference to the drawings,) and also the applicationof the top of the cultivatontooth in the groove aforesaid, and also theapplication of the wrought-iron bolt or shank passing through the saidplate, as beforeY described, and represented by letter I, Fig. 3, andalso represented by letters C.

JOSEPH STOOKD ALE.

In presence of- WM. R. MARTIN, GEO. CooK.

